Mobile cot



H. S. URBAN Feb. 17, 1953 MOBILE COT 2 SHEETS-SHEET 1 Filed July 2, 1951 n M RF Y m E /0 \A v a M m Y/G W m UM fl m m B Feb. 17, 1953 H. s. URBAN 2,628,369

MOBILE CDT 7 Filed July 2, 1951 2 Sl-IEETSSHEET 2 v- I] 3 d, if I, 25 9 29 1A y do ,2 5

INVENTOR ATTORNEY Patented Feb. 17, 1953 UNITED. STATES PATENT ore-Ice 1 My invention is an improved hospital cot or bed; particularly a wheeled eot builtchiefly to serve, as a mobile stretcher for transferring a patient from a bed to another point when'such achange is necessary; and returning the-patient.

to the same bed afterwards.

An important object oftheinvention is to provide a mobile cot that has a lifting frame at its top, 50 connected tothe main framework as'to be capable of manipulation to cause it toproject at one side over a bed or'operating table. Moving the patient is thus. made easy'becauseeither the patient can then shift himself upon'the frame, or at most the patients body has only to be raised highenough for the lifting frame to be passed under it. The lifting frame is then swung up and back till it is down uponthe top ofthe' cot, which can at once be rolled away. The removal of the patient from the cot can also be readily accomplished, because the lifting frame is'now actuated so that it again projects to one side Over the bed or table, and the patient either exerts himself, or his body is held up by the attendants as the cot is withdrawn and the patient is lowered again into a restful position.

A further object of the invention is to provide a cot with such a lifting frame comprising parts which are inexpensive to produce, can be quickly assembled, and are certain and effective in operation; so that the entire unit is quite simple in design, but nicely adapted to serve its intendedpurpose.

Other objects and advantages of this invention are set forth in the ensuing description, and the drawings illustrate a preferred construction in which theinvention is embodied. The claims define the novel features, but I do not wish tobe Figure 3 is an end elevation with-the 11am frame raised.

Figure 4 shows the cot in end elevation with the lifting frame projecting at one side in position to extend across the top of .a bed, table or other support for the body of apatient;

Figure 5 is a top View of part of the structure; and

Figures 6, ,7, 8, and 9 show :details.

The cotor stretcher comprises a;topzl'lavlngthe form of a. rectangular-drama:1;supported-moon.

. lifting: frame 3 isalso-preferably:rectangularin legs 2. 3, whichican be swung toproject atone side, or

folded down upon the topv l. Atithe lower ends;

each of the :legs2 has aacaster or wheel. 4.:1The

outline; and the frame 3,'.also:-thetop ofithe main framework, if desired;--are "filledwith; strong. fabric webbing or (3101311 5; extendingfrom side to side and from end toend-andwflrmly secured. at the edges to bear the weightfiof thepatientsibodyr The legs of course may be made of'verticallyad justable-sections, so tha'te'the co't'may be usedcwith beds and tables of different-heights.

The lifting frame 3"isacoupledtoithetop I by means 'of links disposed to permit-the frame-fi to be SWlll'lgfOutWfi-ld to one side, and to be. pulled:

the frame 3 near the=middle by. a second pivot pin ll. When the frame 3 is swung up from thertop; the links 6 and9 are'rotated on the; pivots]: and i0; and when the links have'movedfartenough, the frame '3'Will projectoutward atFthe side; of

the top, in-substantially; horizontalxposition; as"

indicated in. Figure 4.

To each leg of. the b,:directlyrbeneathrthe. pivot 16,;is pivotally: connected a' lever l2;:;the pivot ,pin on the legbeingiihdicated; by'zthe nuimeral l3; and the two: levers-511,Zaarerconnected at.

their. outer extremities by: a bar |4:r'- The i-gtwo' levers friend the, bar. l9. iconstitute'arxmember;

which is manioulatedto operate; the; frame 3.

-The. levers J2zare-pcachaconnectcd byi'aipalr' of of each pair l5,is attached to thez-adjacentzpivot- I I, orsome other: convenient point, Ollstheblld of the frame 3; and-the othenlower, link l.B.- is:pivotally secured asv at H, to, the .lOWGl'x'BIld of-the adjacent link [5 and to. the iadiacent' lever 1.2 as

at [8, somedistance from thecpivot I 3 of said lever. The pivots l8"may besrivetsswithround heads at one end engaging the levers li and countersunk at the: opposite.v ends in the links 16.

See Figure 9. The lowerendll-l of each link 15' isrelatively wide,- and on' it inn'er facetit-has-"a longitudinal recess or'groove 20 in which theadjacent' lower link 16 can be seated: Theipinsll are studs fixed to the'links :l firand'prciecti through openings in. the ends 19 0.1! the'links Itbcyond Connected toathe top issthe lifting; frame;

the outer faces of the ends IQ of the links I and each tud I7 is encircled by a strong coiled spring 2!, fixed to the stud at one extremity and the link I5 at the other. The force of these springs tends to move the links I6 so that they can be folded and seated in the grooves 28, the links It then extending from the studs I'I towards the pivots I I. The pins or studs I? are secured to the link I6 by welding, riveting or otherwise so that they are rigidly mounted at the end of said links, as shown on Figure 8 which is a section through links I5 and I6 at the stud I'I.

Figures 1, 2 and 3 show the entire mode of operation. The nurse or other attendant forces the bar I4 upward and the thrust of the links it and I6 raises the frame to the position of Figure 3. Further movement of the bar It sv'ings the frame outward and downward to project from one side of the top I, partly across the bed 22, as indicated on Figure 4, and the patient either moves himself or islifted upon the frame 3.

When the frame swings up from the top I, the levers I2 push upon the pins or bolts I3, thus pulling upward on the links It. Through the studs I1, the links I6 push the links I5 upward to raise the frame 3. All this while the short links I6 are seated in the grooves ZII along their entire lengths, but when the links 6 and 9 reach the vertical, the weight of the frame 3 is now exerted on the links I5 and It. The pull of the links If: on the studs I7 is out of line or off center with respect to the studs or pivots I8 and tends to make these links unfold and straighten out. If there is no patient on the frame 3 this time, the attendant checks bar It with one hand and grasps the side of the frame 3 with the other. The frame can even be pushed a little to carry it downward, the links I6 then turning against the force of the springs ZI and slipping out of the grooves 20 till they reach fully distended position, as shown in Figure 4. The frame 3 now rests on the bed 22 nd is ready to receive the patient, and the levers I2 are inclined away from the frame 3, so as to be within easy reach of the attendant when the frame with the patient is raised.

When the bar I4 is pulled back, the links 6 and 9 keep the frame horizontal; and the entire frame 3 moves in a semicircle till it once more rests on the top I. The patient now is supported by the webbing 5 and rests comfortably on the frame 3. When the frame passes through midposition, as in Figure 3, the attendant checks the bar I4, and steadies the frame with his hand as the links I6 fold again towards the links I5, the

stud I'I turning so as to ease the springs 25?, and finally, when the frame rests on the top I, the

links I6 slip back into the grooves 2t.

'When the patient is to be moved from the cot, either back to the bed or upon an operating table, the same procedure is followed. First the cot is rolled to the side of the bed or table, and the bar is worked to get the frame 3 over the top of the bed 22; The bar I4 is now lifted and the frame 3 i manipulated and controlled as before and swings up and outward in a sidewise direction again,*coming to the position seen on Figure l. The'patients body is then transferred to the bed or table and the cot withdrawn. Of course whenever the patient is able, lifting by the attendant is unnecessary. As the frame passes through mid-position shown in Figure 3, the weight of the patient will cause the links I5 and I6 to unfold and straighten out, against the force of the springs 2|. 'Thebar I4 is'checked or .and frame 3 are balanced a pulled back a little to facilitate unfolding the links I5 and I6, and the frame can be steadied by hand to prevent its downward motion from taking place too fast and ending too abruptly.

Another lever 23 is preferably mounted at each end of the top I on pivot pins 2%. Each lever 23 has a lateral stud or bent upper end 2'5 which extends under the adjacent lever I2. At the opposite end, tension springs 26 secure the levers 23 to .the adjacent legs 3. These springs are distended when the frame carrying a patient is depressed, so as to be down fully on the top I, and when the patient nd frame are raised, the force of the springs 26 reduces the amount of effort required of the nurse or other attendant. When the frame 3 is not loaded, the springs 26 tend to lift the levers I2 at the ends 25, and the bar I4 little above the top I, as in Figure 2.

The links I5 have their lower ends I9 farther from the ends of the top I than the outer faces of the levers I2, with the links it in between. See Figure 5 which omits the links 6, 9, I5 and IE for the sake of clearness. The springs 2I on. the studs II are therefore on the outer faces of the ends I9. The upper ends of the links I5 overlie the upper ends of the links 9 and the links El and I5 can be held on the pivots I6 by cotter pins 21. The other pivots on the frame 3 and top I may also carry cotter pins or other suitable means to retain the levers and links mounted thereon. The pivots II! also have collars 28 spacedfrom the top I, and the links 6 have notches 29 in the lower edges to seat upon the pins I0 between the collars 28 and the ends of the frame I when the frame 3 is in the position of Figure 4. The ends of the links 9 are then between the ends of the frame 3 and the links I5.

The Webbing 5 can of course be secured to the frame 3 by any suitable, detachable fastening means, so that the webbing can be loosened from the frame 3, after lifting a patient, and left under him when the frame 3 is raised again; being afterwards removed. As shown on Figures 3 and 4 the links I6 move counterclockwise when they straighten out. When folding they turn on their pivots I! in the opposite direction. One side of the groove ZI'I in the end I9 of each link I5 has a projection 30 to engage the side of the lever I5 when unfolded and serves as a stop and prevents the links I5 from rotating in the wrong direction when folding. As shown in Figure 8 one side of the groove 2i! is rounded or bevelled somewhat as indicated at 3I to facilitate the unfolding of the link It from the groove 20, and each spring 2i always yields and is compressedor wound up by'a fixed pin 32 passed through the end of the stud I'I, when the link I6 moves into cross position on the end I9 having the groove 29. One

end of each spring 2| presses against the fixed transverse pin 32 in the end of the stud I8 bearing it. The other end of each spring is held fast by a stud 33 on the end I9 of the link I5.

The pivots [3 of the levers I2 are shown in outline only on Figures 1, 2, 3 and 4, but they may carry washers on each side of the levers I2,

a collar to space the levers as far as necessary from the top I, and cotter pins to hold the levers I2. See Figure 5.

The cot is therefore well calculated to gain all the ends of the invention.

Having described my invention, What I believe to be new is:

1. A cot having a framework comprising a top; legs supporting thetop, a liftin frame above the top, links pivotally connecting the ends of the lifting frame to the ends of the top, levers pivotally connected to the legs at one side of the top, a bar uniting the free ends of the levers, and additional links pivotally connecting the levers to said frame, and being pivotably connected to each ther, one of said additional links having a recessed end adjacent the other, so that when said additional links are folded together, the other is received in said recessed end.

2. A cot having a framework comprising a top, legs supporting the top, a lifting frame above the top, a link at each end pivotally connecting the top adjacent its longitudinal center to said frame at a side thereof adpacent one side of the cot, another link at each end having a pivot pin connecting it to the top at the opposite side of the cot and pivotally connected to the middle of said frame, levers pivotally mounted on the legs at the last named side, a bar joining the free ends of said levers, and links pivotally connecting the levers to said frame to enable the frame to be moved into projecting position at the last-named side of the top, the first named links then resting on said pivot pins.

3. A cot having a framework comprising a top, legs at each side supporting the top, a lifting frame above the top, links pivotally connecting the ends of the frame to the ends of the top,

levers pivotally connected to the legs at one side of the cot, a bar joining said levers at their free ends, links connecting said levers to said lifting frame, additional levers pivoted at each end of the framework and having ends projecting beneath the aforesaid levers, and a spring connecting each of said additional levers to a leg at the opposite side of the cot, said springs being under tension when the frame is on the top, and the first named levers are engaged by the projecting ends of said additional levers.

e. A cot having a framework comprising a top, legs supporting the top, a lifting frame above the top, links pivotally connecting the ends of the lifting frame to the ends of the top, levers pivotally connected to the legs at one side of the top, a bar uniting the free ends of the levers, and additional links pivotally connecting the levers to said frame, the last-named links comprising a pair at each end, one link of each pair being pivotally connected to the adjacent lever at one end, and the other pivotally connected at one end to the frame, said one link having a fixed stud at its opposite end pivotally connecting it to the adjacent end of said other link and a spring adjacent each stud affixed at its ends to said stud and the other link and stressed to urge said links to folded position.

5. A cot having a framework comprising a top, legs supporting the top, a lifting frame above the top, links pivotally connecting the ends of the lifting frame to the ends of the top, levers pivotally connected to the legs at one side of the top, a bar uniting the free ends of the levers, and additional links pivotally connecting the levers to said frame, the last-named links comprising a pair at each end, one link of each pair being pivotally connected to the adjacent lever at oneend, and the other pivotally connected at one end to the frame, said one link having a fixed stud at its opposite end pivotally connecting it to the adjacent end of said other link and a spring adjacent each stud aifixed at its ends to said stud and the other link and stressed to urge said links to folded position, the adjacent end of said other link having a longitudinal groove into which said one link when folded is seated.

6. A cot having a framework comprising a top, legs supporting the top, a lifting frame above the top, links pivotally connecting the ends of the lifting frame to the ends of the top, levers pivotally connected to the legs at one side of the top, a bar uniting the free ends of the levers, and additional links pivotally connecting the levers to said frame, the last-named links comprising a pair at each end, one link of each pair being pivotally connected to the adjacent lever at one end, and the other pivotally connected at one end to the frame, said one link having a fixed stud at its op posite end pivotally connecting it to the adjacent end of said other link and a spring adjacent each stud affixed at its ends to'said stud and the other link and stressed to urge said links to folded position, the adjacent end of said other link having a longitudinal groove into which said one link when folded is seated, said cot having additional levers pivoted at each end of the framework and having ends projecting beneath the aforesaid levers, and a spring connecting each of the additional levers to a leg at the opposite side of the cot, said springs being under tension when the frame is down on the top and the first-named l levers are engaged by the projecting ends of the additional levers.

HOWARD S. URBAN.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 1,129,775 Anthony Feb. 23, 1915 2,513,440 Alderson July 4, 1950 2,542,963 Knox et a1. Feb. 20, 1951 

